Pad holder for rubbing machines



Dec. 16, 1930. G." Ks oM 1,785,695

PAD HQLDER FOR RUBBING MACHINES Filed June 11, 1923 H65 M fiaaiaf H 5765260771 Patented Dec. 16, 1930 QUINITED STATES GnsrAr. II. EKSTROM, or nocxronn, ILLINOIS, ASSIGNOR To 0. PAUL PARKER,

' TRUSTEE, or nvans'ron, ILLINOIS PATENT, OFFICE ZPAD HOLDER FOR RUBBING MACHINES a lication filed June 11, 1923. Serial no. 644,567.

The invention relates to improvements in pad holders for rubbing polishing machines, and particularly forsuch machines having reciprocating pads and bearing slides.

character are commonly constructed with an Bearing slides for machines of the above upper bearing plate, mounted for reciprocation within the machine body, and a lower parallel pad holder supporting plate integrally connected therewith by a central upright web. The supporting plate is usually provided at each sidewith a downwardly extending projection to which the pad holder is secured. Heretofore pad holders have been provided with upstanding lugs adapted to fit over the ends of the projections. The lugs are held in position by bolts or pins extending through the projections lengthwise of the machine. Heavv felt rubbing pads are sepa :rately mounted upon the flat backing of each pad holder.

' The rubbing pads are thus positioned at a material distance from the body of the machine, thereby increasing the overall vertical When in operation, the pads have a large leverage upon the bearing slides thereby causing increased friction and binding between the slides and their guideways.

The horizontal bolts or pins by which the pad holders are held in place are subject to an objectionable amount of end thrust which results in wear and lost motion.

The primary object of the invention is to avoid the above objections by providing a pad holder which brings the rubbing pad close to the body of the rubbing machine.

A further object is to provide a pad holder which is secured to the bearing slide by vertically extending screws, thereby eliminating the upwardly extending lugs and transverse screws;

Another object is to provide a pad holder in which the attaching screws for securing the holder to the bearingslide also serve to hold Another object is to provide a pad holder which is made of simple and easily constructed parts, and which is efiicient in use.

Further objects and advantages will become apparent as the description proceeds.

In the accompanying drawings which illuss trate the preferred embodiment of my invention, Figure 1 is a fragmentary side View of a rubbing machine with my improved pad holder attached thereto. Fig. 2 is a View in perspective of a pad holder slide of common construction with my improved pad holder thereon. Fig, 3 is a plan View of the top plate, and Fig. 4 is a plan View of the bottom plate of the pad holder. Fig. 5 is a plan view of a modified form of pad holder, and Fig. 6 is a side view-thereon In the drawings, 10 indicates the body of a rubbing machine of well known construction which encloses a bearing slide 11 adapted to be reciprocated by any suitable means,

as i

such 'asfluid actuated'pistons. Mounted on a pad holder 12 to which is secured a rubbing pad 13 of'any suitable character.

The bearing slide 11 has an upper plate 14, preferably made with a serrated bearing surface 15, and an attaching plate 16 rigidly connected thereto by a central upright web 17. The attaching plate is mounted for re ciprocation just below the body of the machine. Mounted on opposite sides of the attaching plate are parallel downwardly extending projections 18 which extend length- Wise of the machine. Each projection is pro vided with a plurality of vertical tapped bores 19 for attaching the pad holder.

The pad holder 12 comprises a rectangular openings22 in the top plate 21 are adapted to receive the lower ends of the projections 18. The plates are secured together by any suitable means such as rivets 23. Holes 24 in the bottom plate 20 underlie the slots 22, and are in alinement with the bores 19 when the assembled pad is in position on the hearing slide. The pad and pad holder are secured to the bearing slide by screws 25 which of the bottom plate 20.. The pad holder 12 is separately attached to the bearing slide 11 by the screws 25, and the plate'26is then secured to the pad holder by bolts 28. The

top plate 21 is lengthened to extend entirely across the bottom plate to providea' seat for the nuts 29 on the bolts 28. When the pad 13 is worn or when work of a different kind is to be performed, the plate 26 may be .quickly removed and a new plate; with the proper kind of therefor. g

I have eliminated the upstanding lugs rubbing pad substituted i found onprior pad holders and the longitudinal screws for securing the lugs to the projections. Instead I have utilized the screws for attaching the pads to the holders to also secure the holders to the bearing slides.

The troublesome end thrust on the old screws is thus eliminated.

of the machine is reduced. The parts oi. the

The overall dimension pad holder are simple in construction and inexpensive to manufacture. The pad holder is held rigidly in place, and is durable'and efiicient in use.

.While I have disclosed the preferred embodiment of my invention with considerable particularity for purposes of illustration, it

having, in combination, a movable slide member having a projection extending in the line of movement, a plate having a slot fitting over said projection, a second plate. fit-J ting directly against said projection, means for rigidly securing said second plateto said pro ection, means rigidly connecting said plates,a nda rubbing pad on said second plate. I

4. A pad holder for rubbing machines having, incombination, a' movable operating member, a removable plate in interlocking engagement with said member, a second plate fitting directly against said removable plate, a rubbingpad on said second plate, means securing said second plate to said first plate, and means removablysecuring said second plate to said member, said second plate holding said first plate said member'in interlocking relationship.

In testimony whereofil have hereunto at fixed my signature. Y GUSTAF EKSTROM.

1 should'be understood that variouschanges v may be made without departing from the spirit and scope of the invention as expressed in the appended claims.

I claim as my invention:

1. A pad holder for rubbing machines having, in combination a bearing slide having screw openings and downward projections, a topplate having slots for receiving the clownward pro ections of said bearing slide, a bot- .tom plate secured to said top plate'and havling holes underlying said slots, a rubbing pad, and screws extending through said holes into said screw openings for holding the rubbing pad against said bottom plate and said bottom plate against said bearing I slide. i

V 2. A pad holder for rubbing machines having, downward projections, a top plate having openings therein for receiving the downward projections, a bottom plate fitting below said top plate and directly against said projections, means for securing said plates together,

1 and screw means for securing said bottom plate to'said projections.

3. A pad holder for rubbing machines in combination, a bearing slide having 

